refactor: rename McpFunction attributes (subToolName -> name, parameterSchema -> inputSchema) and remove hardcoded API key

axhub-tool-email/src/main/java/io/shinhanlife/axhub/biz/mcp/tool/email/EmailToolService.java

@@ -27,7 +27,7 @@ import java.util.Map;
 @McpTool(routingType = "EAI", categoryKey = "notification")
 public class EmailToolService extends AbstractMcpToolService {
 
-    @McpFunction(name = "send_email 툴", subToolName = "send_email", description = "이메일 발송", prompt = "고객에게 이메일을 발송해줘.", mappingId = "EMAIL_SEND_001")
+    @McpFunction(displayName = "send_email 툴", name = "send_email", description = "이메일 발송", prompt = "고객에게 이메일을 발송해줘.", mappingId = "EMAIL_SEND_001")
     public Object sendEmail(EmailSendReq req) {
         log.info("[Email] 이메일 발송 요청 수신. 수신자: {}", req.getEmailAddress());
 

axhub-tool-email/src/main/resources/application-local.properties

@@ -17,7 +17,6 @@ eims.mcistring.url=http://localhost:${server.port}/api/mock/esb/string
 
 # API 보안 키 설정
 mcp.security.api-keys.SHINHAN_MCP_SECRET_KEY_2026=mcp-client-1
-mcp.security.api-keys.SHINHAN_MCP_TEST_KEY_9999=mcp-client-2
 mcp.security.tenant-domains.mcp-client-1=CUSTOMER,COMMON
 mcp.security.tenant-domains.mcp-client-2=ALL